I have done it a couple times. I convert standard chain sets(top gears) all the time too. It is the same for the Milodon gear drive. Take the top Milodon gear and open up the ID to .999"-1.00" measure your stub cam you have to see which ID you need to go to so that you have a press fit. Have a 3/16" key way broached in 180' off dot. You will need to make new dot also at 180' for the new timing now. On chain style/top gears I have to cut the back step off and make width .825" .Use heat to warm up big gear/ freeze stub shaft and press together ( only your Milodon gear) install stub shaft. Use a large straight edge from other gears and mark stub cam with dye chem and scribe where to distance the drive gear. Go back to oven and freezer and press the drive gear to your scribed line and you are good.No need to pin or bolt, the press and keyway will hold just loke OEM. Then you can assemble and time everything. Here is a picture of one for you. Not my engine ( Dont Drool), but I have done it.
Doug aka pumpbldr
Precision Oil Pumps
